One vertex per element, one color per generator, with an edge from x to x·s.
(2,4)(6,7)(13,14,19,22)(15,20,16,17)(18,26,27,21)(23,25,24,28)(6,7)(10,12)(13,15,19,16)(14,17,22,20)(18,23,27,24)(21,25,26,28)(5,6,8,7)(9,10,11,12)(13,16,19,15)(14,20,22,17)(18,24,27,23)(21,28,26,25)(1,2,3,4)(5,7,8,6)(13,17,19,20)(14,16,22,15)(18,25,27,28)(21,24,26,23)(13,18,19,27)(14,21,22,26)(15,23,16,24)(17,25,20,28)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.